The threat of an upset grew as the Scot was unable to turn things around at the onset of the 2nd set. Just as in the 1st set, Murray was down early and things looked pretty grim. However, at 1-5 down he began to mount a comeback. Cilic had a chance to serve for the 2nd set twice, even earning himself a set point, but could not convert. Instead, Murray exhibited both tenacity and maturity in fighting his way back to a 2nd set tiebreak.
After winning the tiebreak in emphatic fashion, the crowd at Louis Armstrong stadium were treated to the Murray that won Olympic gold a few weeks ago. He dominated in the 3rd and 4th sets to take the victory from Cilic.
Murray will play Tomas Berdych in the semifinals. Berdych stunned Roger Federer on Wednesday night, defeating him in 4 sets. With the world no. 1 out of the draw, Murray will feel good about his chances of reaching the final and perhaps winning his first grand slam tournament.